While acquiring parts for my T56 swap and needing motor mounts anyways I came across these and after looking at what is out there for the factory "clam shell" type they seem like crap and a poor design to begin with. They want you to peel apart a factory mount, remove the worn mount, install their mount and put the old crap back in. Lame.
I found these Camaro solid frame mounts from Moroso planning to weld them to my frame brackets and guess what. They BOLT IN! $30 from Jegs.
Then I went with a PROTHANE short motor mount early 70s Malibu/Impala ish also from Jegs.
They will end up being same height as stock block mount/clam shell setup, bolt in and way cleaner looking.
Anyone use this?

Mounts in either set of frame holes...
Bolt is an old cab mount bolt I cut down
Had to drill out hole in Prothane mount so I tapped threads in one end so don't actually need a nut.